Motor-pump.



No. 657,160. Patented Sept. 4, |900. W. H. EADS.

MUTOR PUMP.

(Application led July 19, 1898.)

2 Sheets-Sheet I.

(No Model.)

62X) w y www Km mmmw @nw g W .9921 www Patented Sept. 4, |900. W. H. EADS.

MOTOR (Application led PUMP.

July 19.18%)

2 Sheets-Sheet 2 (No Moden.)

5@ MM D x A3 d?? Uhr,

lTnn STATES PATENT Ormes.

IVILLIAM II. EADS, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO HAROLD M. PLAISTED, OF SAME PLACE.

MOTOR-PUMP.

SPECIFICATION forming part of Letters Patent No. 657,160, dated September 4, 19O. Application flied July 19, 189s. serial No. 686,382. (No man.)

To all whom, it may concern,.-

Be it known that IVILLIAM H EADS, a citizen of the United States, residing at St. Louis, in the State of Missourhhave invented certain new and useful Improvements in Motor- Pumps, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvelnents in motor-pumps, the peculiarities of which will be hereinafter fully described and claimed.

The chief object of my invention is to provide a pumping-machine to be attached to a water-pipe or other source of water under pressure for the purpose of increasing the water-pressure upon a portion (preferably half) of the full amount of water passing through the pump, and thereby increasing the height .or distance to which such portion of water may be delivered.

Another object is to avoid the loss of efficiency caused by the suction of the water into the pumping-cylinder and in place of such suction to deliver the water to the cylinders under pressure of the supply from the city main or other source.

To this end :mylimprovements have reference to a plurality (preferably two) of pumping-cylinders interconnected and each adding its proportionate impulse to the portion of water which is to be forced to the higher altitude corresponding with the increased pressure thus attained; have reference to a valve for admitting water from ports under pressure to the ends of said cylinders alternately; have reference to a primary valve for operating this port-valve, and have reference to other points of detail hereinafter described and claimed.

In the accompanying drawings, on which like reference-letters indicate corrpsponding parts, Figure 'l represents a vertical longitudinal section of my device; Fig. 2, a vertical cross-section on the line traf, Fig. l, and Fig. 3, a similar cross-section on the line y y, Fig. l.

The letter A designates the pumping-cylinder, in which are located the pistons B B, suitably packed by cup-shaped rings or any other manner and connected by a piston-rod C or otherwise, so as to travel silnultaneously in the same direction and transfer the pressure alternately from one to the other. Each cylinder is provided with two ports D E and D E, respectively. The ports form longer or shorter passage-ways according to circumstances and open on opposite sides of the pistons B B', so that when the water is admitted through the ports D D on the same side of the respective pistons the said pistons will move in one directionthat is, to the right, as shown-and when the water is admitted through the ports E E the pistons will make the return stroke"in unison. Each cylinder has a discharge-passage F F,which communicates through a primary valve or cut-off G with the waste-pipe H. It will be seen that but one discharge-pipe is provided for each cylinder and that the discharge is from one side of the piston, respectively. This is the waste water, which will be used to operate the pistons, but will be discharged as dead water. On the other side of each piston the water will be forced onward through check-valves I I to the outlet-pipe J and deliver a continual stream thereto under pressure of the air in the air-chamber K, which acts as an elastic cushion.

In the position of the port-valve shown in Fig. 1 the water is admitted under pressure from the city main or other source of supply through the pipe L, which branches and leads the water to the same side-that is, the left in the ligure-of the pistons B B. The water that is on the right of the piston B will be discharged through the pipe F when the stroke is made. The water on the right of the piston B will be forced up through the valve I under the combined pressure of the pistons B and B', connected as they are by the piston-rod C, Or other suitable means.

Thus the water in the cylinder A' will be acted on by the combined pressure of the two f pistons, and in this case double the pressure will be exerted on the water to force it onward to the outlet J. Thus half of the water is discharged as dead Watelgwhile the other half is subjected to double the pressure and forced onward to the outlet. On the return stroke the water that has entered the cylinder A. under pressure and exerted such pres-h sure in moving the piston B to the right will IOO be discharged through the passage F to the waste-pipe. On the other hand, the water in the cylinder A, which has just been utilized under pressure to force the piston B to the right and aid in expelling the water in the cylinder A', will now during the return stroke be forced upward through the checkvalve I at the left to the outlet J.

The ports are opened and closed alternately to effect the admission of water to alternate sides of the pistons by means of a port-valve, one form of which is illustrated in Fig. 1, which shows the passage d d' opposite the ports D D to admit the water at the beginning of the stroke to the right, and it also has similar openings or passages e e', shown as closed in Fig. l, but which are adapted to admit the water from the branch supplypipes to the respective ports E E when the port-valve is shifted to the left. In order to effect such change of position of the portvalve at the end of each stroke, I provide a cut-off or primary valve G, before mentioned, operated by suitable connection with the pistons at or near the end of each stroke. This movement of the primary valve will effect the change of position of the port-valve,

and hence effect the admission of the water to alternate sides of the pistons. I will now describe one form of such cent-off or primary valve, but do not limit myself to any particular form or connection in the combination with the cylinders and port-valve, as it is evident that other forms of such operative primary valve may be employed, and other connections with the pistons may be used for operating the same.

As shown on the drawings, the primary valve G consists of a tubular cylinder mounted in a cylindrical chamber located between the pump-cylinders and embracing the piston-rod C. A projection or key M from the piston is adapted to engage with the ends or alternately the inner ends of the passages O f O' and allow the discharge of water from the annular chambers shown near the ends of the port valve. The water is supplied under pressure through a passage Q, connecting the vsupply-pipe with an inclosed chamber R of the valve G by means/of a suitable port which is long enough to provide constant communication with the passage Q. The `Dv-valve,

before mentioned, having ports on veach side, l as shown, admits the water first to lone side and then to the other of the port-valve as the f primary valve is shifted by the pistons, as

before described. Thus the movement of the pistons to the left has thrown the D-valve to the left and opened the port O', communicating with the left-hand of the port-valve and throwing it to the right to set it, as shown in the drawings. The pressure of the water upon the port-valve will maintain it in its position, as shown, until the pistons have traveled to the right nearly to the end of their stroke, when the projection M will shift the primary valve to the right and open the port O, by which the water enters at the right of the port-valve and shifts it to the left, thus causing the water to enter at the opposite sides of the pistons.

Referring to Fig. l, it will be observed that the water under pressure entering the port D cannot find outlet through the discharge passage F as it is closed by the cut-off valve until the piston B' is near the end of its stroke to the right. Then the discharge-passage F is opened to allow the exit of the waste water on the return stroke to the left, and the discharge-passage F for the cylinder A is closed to prevent the exit of the water, which will enter through the port E by the shifting of the port-valve caused by the entrance of the water under pressure through the pasa sages Q and O.

Although the valves I I open upward, yet they will not be opened by an ordinary pressure from the city main used in operating the pump unless the pressure on the other side of the valvps is less than the pressure in the main, as in first starting. When the pump is in full operation the Water-pressure above the valves is greater than that of the main and increases the same until it is substantially double the pressure in the main. This follows from the operation and construction above described by which the two pistons combine their pressure upon the water in one cylinder, while the water on the corresponding side of the other cylinder is discharged but as dead or waste water. This is one of the chief points of my invention.

It will be understood that a different arrangement and detail of the ports may be employed without departing from the principle of my invention and its object, as hereinbefore described. I therefore do not limi-t myself to the exact construction herein shown, which is used to exemplify one form of my motor-pump.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is I 1. A motor-pump comprising a plural'ityof interconnected pistons and their cylinders, each provided with inlet-openin gs on opposite sides lof the respective piston, and a dischargeopening on one side of said piston, a supplypipe communicating with water under pressure, a port-valve communicating with said suppl'y-pipeand admitting water to said inletvopenings alternately, va cut-od valve for said discharge-openings alternately, and intercon IIO eist/,lo

nections between said cut-ott valve and said pistons adapted to operate the former near the end of each stroke of said pistons, and suitable inlet and outlet passages for said cutoff valve.

2. A motor-pump comprising a pair of connected pistons and their cylinders, each piston provided with inlet-ports on opposite sides of the piston, a discharge-opening at one side ot each piston and a valve-closed outlet at the opposite side thereof, a supply-pipe to water under pressure, an interposed portvalve communicating with said supply-pipe and with corresponding inlet-ports for said cylinders alternately, a cut-oft' valve for said discharge openings, connecting means between said cut-oit valve and said pistons to operate the former near the end of the stroke ot' the latter, and means for operating said port-valve by the movement of said cut-oft valve.

3. In a motor-pump, a pair of connected pistons and their cylinders, each cylinder provided with a discharge for Waste water at one side of the piston and a valvular exit at the other side of the piston, and with suitable inlet-ports at opposite ends of each cylinder, and meansto open and close said ports alternately, and open and close said Waste-discharge openings, whereby the full amount of water admitted to the pistons is used to force substantially half of the water to double the height, While wasting substantially half or the balance of said amount.

4. A motor-pump comprising the pistons B B', a connecting-rod C, the inclosing cylinders A A', provided with the discharge-passages F F and the valve-closed openings opposite said discharge-openings, and each cylinder provided with inlet-ports at each end, a port-valve for said ports, a supply-pipe communicating with said valve, and a cuto valve for said discharge-passages and for operating said port-valve, substantially as described.

In testimony whereof I alix my signature in presence of two witnesses.

VILLIAM H. EADS. 

